src/screen_song.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "screen_file.h"
  21 #include "i18n.h"
  22 #include "screen.h"
  23 #include "screen_utils.h"
  24 #include "charset.h"
  25 #include "utils.h"
  26 #include "mpdclient.h"
  27
  28 #include <mpd/client.h>
  29
  30 #include <glib/gprintf.h>
  31 #include <assert.h>
  32 #include <string.h>
  33
  34 static list_window_t *lw;
  35
  36 static struct mpd_song *next_song;
  37
  38 static struct {
  39         struct mpd_song *selected_song;
  40         struct mpd_song *played_song;
  41         GPtrArray *lines;
  42 } current;
  43
  44 static void
  45 screen_song_clear(void)
  46 {
  47         for (guint i = 0; i < current.lines->len; ++i)
  48                 g_free(g_ptr_array_index(current.lines, i));
  49
  50         g_ptr_array_set_size(current.lines, 0);
  51
  52         if (current.selected_song != NULL) {
  53                 mpd_song_free(current.selected_song);
  54                 current.selected_song = NULL;
  55         }
  56         if (current.played_song != NULL) {
  57                 mpd_song_free(current.played_song);
  58                 current.played_song = NULL;
  59         }
  60 }
  61
  62 static void
  63 screen_song_paint(void);
  64
  65 /**
  66  * Repaint and update the screen.
  67  */
  68 static void
  69 screen_song_repaint(void)
  70 {
  71         screen_song_paint();
  72         wrefresh(lw->w);
  73 }
  74
  75 static const char *
  76 screen_song_list_callback(unsigned idx, G_GNUC_UNUSED bool *highlight,
  77                           G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
  78 {
  79         static char buffer[256];
  80         char *value;
  81
  82         if (idx >= current.lines->len)
  83                 return NULL;
  84
  85         value = utf8_to_locale(g_ptr_array_index(current.lines, idx));
  86         g_strlcpy(buffer, value, sizeof(buffer));
  87         g_free(value);
  88
  89         return buffer;
  90 }
  91
  92
  93 static void
  94 screen_song_init(WINDOW *w, int cols, int rows)
  95 {
  96         /* We will need at least 10 lines, so this saves 10 reallocations :) */
  97         current.lines = g_ptr_array_sized_new(10);
  98         lw = list_window_init(w, cols, rows);
  99         lw->hide_cursor = true;
 100 }
 101
 102 static void
 103 screen_song_exit(void)
 104 {
 105         list_window_free(lw);
 106
 107         screen_song_clear();
 108
 109         g_ptr_array_free(current.lines, TRUE);
 110         current.lines = NULL;
 111 }
 112
 113 static void
 114 screen_song_resize(int cols, int rows)
 115 {
 116         lw->cols = cols;
 117         lw->rows = rows;
 118 }
 119
 120 static const char *
 121 screen_song_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 122 {
 123         return _("Song viewer");
 124 }
 125
 126 static void
 127 screen_song_paint(void)
 128 {
 129         list_window_paint(lw, screen_song_list_callback, NULL);
 130 }
 131
 132 /* Appends a line with a fixed width for the label column
 133  * Handles NULL strings gracefully */
 134 static void
 135 screen_song_append(const char *label, const char *value, unsigned label_col)
 136 {
 137         int value_col, linebreaks, entry_size, label_size;
 138         int i, k;
 139         gchar *entry, *entry_iter;
 140         const gchar *value_iter;
 141
 142         assert(label != NULL);
 143         assert(g_utf8_validate(label, -1, NULL));
 144
 145         if (value != NULL) {
 146                 assert(g_utf8_validate(value, -1, NULL));
 147                 /* +2 for ': ' */
 148                 label_col += 2;
 149                 value_col = lw->cols - label_col;
 150                 /* calculate the number of required linebreaks */
 151                 linebreaks = (utf8_width(value) - 1) / value_col + 1;
 152                 value_iter = value;
 153                 label_size = strlen(label) + label_col - utf8_width(label);
 154                 entry_size = label_size + strlen(value) + 2;
 155
 156                 for (i = 0; i < linebreaks; ++i)
 157                 {
 158                         entry = g_malloc(entry_size);
 159                         if (i == 0) {
 160                                 entry_iter = entry + g_sprintf(entry, "%s: ", label);
 161                                 /* fill the label column with whitespaces */
 162                                 for ( ; entry_iter < entry + label_size; ++entry_iter)
 163                                         *entry_iter = ' ';
 164                         }
 165                         else {
 166                                 entry_iter = entry;
 167                                 /* fill the label column with whitespaces */
 168                                 for ( ; entry_iter < entry + label_col; ++entry_iter)
 169                                         *entry_iter = ' ';
 170                         }
 171                         /* skip whitespaces */
 172                         while (g_ascii_isspace(*value_iter)) ++value_iter;
 173                         k = 0;
 174                         while (value_iter && k < value_col)
 175                         {
 176                                 g_utf8_strncpy(entry_iter, value_iter, 1);
 177                                 value_iter = g_utf8_find_next_char(value_iter, NULL);
 178                                 entry_iter = g_utf8_find_next_char(entry_iter, NULL);
 179                                 ++k;
 180                         }
 181                         *entry_iter = '\0';
 182                         g_ptr_array_add(current.lines, entry);
 183                 }
 184         }
 185 }
 186
 187 static void
 188 screen_song_append_tag(const char *label, const struct mpd_song *song,
 189                        enum mpd_tag_type tag, unsigned label_col)
 190 {
 191         unsigned i = 0;
 192         const char *value;
 193
 194         while ((value = mpd_song_get_tag(song, tag, i++)) != NULL)
 195                 screen_song_append(label, value, label_col);
 196 }
 197
 198 static void
 199 screen_song_add_song(const struct mpd_song *song, const struct mpdclient *c)
 200 {
 201         unsigned i, max_label_width;
 202         enum label {
 203                 ARTIST, TITLE, ALBUM, LENGTH, COMPOSER, NAME, DISC, TRACK,
 204                 DATE, GENRE, COMMENT, BITRATE
 205         };
 206         const char *labels[] = { [ARTIST] = _("Artist"),
 207                 [TITLE] = _("Title"),
 208                 [ALBUM] = _("Album"),
 209                 [LENGTH] = _("Length"),
 210                 [COMPOSER] = _("Composer"),
 211                 [NAME] = _("Name"),
 212                 [DISC] = _("Disc"),
 213                 [TRACK] = _("Track"),
 214                 [DATE] = _("Date"),
 215                 [GENRE] = _("Genre"),
 216                 [COMMENT] = _("Comment"),
 217                 [BITRATE] = _("Bitrate"),
 218         };
 219         /* Determine the width of the longest label */
 220         max_label_width = utf8_width(labels[0]);
 221         for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 222                 if (utf8_width(labels[i]) > max_label_width)
 223                         max_label_width = utf8_width(labels[i]);
 224         }
 225
 226         assert(song != NULL);
 227
 228         screen_song_append_tag(labels[ARTIST], song, MPD_TAG_ARTIST,
 229                                max_label_width);
 230         screen_song_append_tag(labels[TITLE], song, MPD_TAG_TITLE,
 231                                max_label_width);
 232         screen_song_append_tag(labels[ALBUM], song, MPD_TAG_ALBUM,
 233                                max_label_width);
 234         /* create time string and add it */
 235         if (mpd_song_get_duration(song) > 0) {
 236                 unsigned t = mpd_song_get_duration(song);
 237                 char length[16];
 238
 239                 /*write out the time, using hours if time over 60 minutes*/
 240                 if (t > 3600) {
 241                         g_snprintf(length, sizeof(length),
 242                                         "%i:%02i:%02i",
 243                                         t/3600, (t%3600)/60, t%60);
 244                 } else {
 245                         g_snprintf(length, sizeof(length),
 246                                         "%i:%02i", t/60, t%60);
 247                 }
 248                 screen_song_append(labels[LENGTH], length, max_label_width);
 249         }
 250         screen_song_append_tag(labels[COMPOSER], song, MPD_TAG_COMPOSER,
 251                                max_label_width);
 252         screen_song_append_tag(labels[NAME], song, MPD_TAG_NAME,
 253                                max_label_width);
 254         screen_song_append_tag(labels[DISC], song, MPD_TAG_DISC,
 255                                max_label_width);
 256         screen_song_append_tag(labels[TRACK], song, MPD_TAG_TRACK,
 257                                max_label_width);
 258         screen_song_append_tag(labels[DATE], song, MPD_TAG_DATE,
 259                                max_label_width);
 260         screen_song_append_tag(labels[GENRE], song, MPD_TAG_GENRE,
 261                                max_label_width);
 262         screen_song_append_tag(labels[COMMENT], song, MPD_TAG_COMMENT,
 263                                max_label_width);
 264         screen_song_append(_("Path"), mpd_song_get_uri(song), max_label_width);
 265         if (c->status != NULL && c->song != NULL &&
 266             strcmp(mpd_song_get_uri(c->song), mpd_song_get_uri(song)) == 0 &&
 267             (mpd_status_get_state(c->status) == MPD_STATE_PLAY ||
 268              mpd_status_get_state(c->status) == MPD_STATE_PAUSE)) {
 269                 char buf[16];
 270                 g_snprintf(buf, sizeof(buf), _("%d kbps"),
 271                            mpd_status_get_kbit_rate(c->status));
 272                 screen_song_append(labels[BITRATE], buf, max_label_width);
 273         }
 274 }
 275
 276 static void
 277 screen_song_add_stats(const struct mpdclient *c)
 278 {
 279         unsigned i, max_label_width;
 280         char buf[64];
 281         char *duration;
 282         GDate *date;
 283         enum label {
 284                 ARTISTS, ALBUMS, SONGS, UPTIME,
 285                 DBUPTIME, PLAYTIME, DBPLAYTIME
 286         };
 287         const char *labels[] = { [ARTISTS] = _("Number of artists"),
 288                 [ALBUMS] = _("Number of albums"),
 289                 [SONGS] = _("Number of songs"),
 290                 [UPTIME] = _("Uptime"),
 291                 [DBUPTIME] =_("Most recent db update"),
 292                 [PLAYTIME] = _("Playtime"),
 293                 [DBPLAYTIME] = _("DB playtime")
 294         };
 295         struct mpd_stats *mpd_stats = NULL;
 296
 297         if (c->connection != NULL) {
 298                 mpd_stats = mpd_run_stats(c->connection);
 299         }
 300
 301         if (mpd_stats != NULL) {
 302                 /* Determine the width of the longest label */
 303                 max_label_width = utf8_width(labels[0]);
 304                 for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 305                         if (utf8_width(labels[i]) > max_label_width)
 306                                 max_label_width = utf8_width(labels[i]);
 307                 }
 308
 309                 g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 310                 g_snprintf(buf, sizeof(buf), "%d",
 311                            mpd_stats_get_number_of_artists(mpd_stats));
 312                 screen_song_append(labels[ARTISTS], buf, max_label_width);
 313                 g_snprintf(buf, sizeof(buf), "%d",
 314                            mpd_stats_get_number_of_albums(mpd_stats));
 315                 screen_song_append(labels[ALBUMS], buf, max_label_width);
 316                 g_snprintf(buf, sizeof(buf), "%d",
 317                            mpd_stats_get_number_of_songs(mpd_stats));
 318                 screen_song_append(labels[SONGS], buf, max_label_width);
 319                 duration = time_seconds_to_durationstr(mpd_stats_get_db_play_time(mpd_stats));
 320                 screen_song_append(labels[DBPLAYTIME], duration, max_label_width);
 321                 g_free(duration);
 322                 duration = time_seconds_to_durationstr(mpd_stats_get_play_time(mpd_stats));
 323                 screen_song_append(labels[PLAYTIME], duration, max_label_width);
 324                 g_free(duration);
 325                 duration = time_seconds_to_durationstr(mpd_stats_get_uptime(mpd_stats));
 326                 screen_song_append(labels[UPTIME], duration, max_label_width);
 327                 g_free(duration);
 328                 date = g_date_new();
 329                 g_date_set_time_t(date, mpd_stats_get_db_update_time(mpd_stats));
 330                 g_date_strftime(buf, sizeof(buf), "%x", date);
 331                 screen_song_append(labels[DBUPTIME], buf, max_label_width);
 332                 g_date_free(date);
 333
 334                 mpd_stats_free(mpd_stats);
 335         }
 336 }
 337
 338 static void
 339 screen_song_update(struct mpdclient *c)
 340 {
 341         /* Clear all lines */
 342         for (guint i = 0; i < current.lines->len; ++i)
 343                 g_free(g_ptr_array_index(current.lines, i));
 344         g_ptr_array_set_size(current.lines, 0);
 345
 346         /* If a song was selected before the song screen was opened */
 347         if (next_song != NULL) {
 348                 assert(current.selected_song == NULL);
 349                 current.selected_song = next_song;
 350                 next_song = NULL;
 351         }
 352
 353         if (current.selected_song != NULL &&
 354                         (c->song == NULL ||
 355                          strcmp(mpd_song_get_uri(current.selected_song),
 356                                 mpd_song_get_uri(c->song)) != 0 ||
 357                          c->status == NULL ||
 358                          (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 359                           mpd_status_get_state(c->status) != MPD_STATE_PAUSE))) {
 360                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 361                 screen_song_add_song(current.selected_song, c);
 362                 g_ptr_array_add(current.lines, g_strdup("\0"));
 363         }
 364
 365         if (c->song != NULL && c->status != NULL &&
 366             (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 367              mpd_status_get_state(c->status) != MPD_STATE_PAUSE)) {
 368                 if (current.played_song != NULL) {
 369                         mpd_song_free(current.played_song);
 370                 }
 371                 current.played_song = mpd_song_dup(c->song);
 372                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 373                 screen_song_add_song(current.played_song, c);
 374                 g_ptr_array_add(current.lines, g_strdup("\0"));
 375         }
 376
 377         /* Add some statistics about mpd */
 378         if (c->connection != NULL)
 379                 screen_song_add_stats(c);
 380
 381         screen_song_repaint();
 382 }
 383
 384 static bool
 385 screen_song_cmd(struct mpdclient *c, command_t cmd)
 386 {
 387         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 388                 screen_song_repaint();
 389                 return true;
 390         }
 391
 392         switch(cmd) {
 393         case CMD_LOCATE:
 394                 if (current.selected_song != NULL) {
 395                         screen_file_goto_song(c, current.selected_song);
 396                         return true;
 397                 }
 398                 if (current.played_song != NULL) {
 399                         screen_file_goto_song(c, current.played_song);
 400                         return true;
 401                 }
 402
 403                 return false;
 404
 405 #ifdef ENABLE_LYRICS_SCREEN
 406         case CMD_SCREEN_LYRICS:
 407                 if (current.selected_song != NULL) {
 408                         screen_lyrics_switch(c, current.selected_song, false);
 409                         return true;
 410                 }
 411                 if (current.played_song != NULL) {
 412                         screen_lyrics_switch(c, current.played_song, true);
 413                         return true;
 414                 }
 415                 return false;
 416
 417 #endif
 418
 419         case CMD_SCREEN_SWAP:
 420                 if (current.selected_song != NULL)
 421                         screen_swap(c, current.selected_song);
 422                 else
 423                 // No need to check if this is null - we'd pass null anyway
 424                         screen_swap(c, current.played_song);
 425                 return true;
 426
 427         default:
 428                 break;
 429         }
 430
 431         if (screen_find(lw, current.lines->len,
 432                         cmd, screen_song_list_callback, NULL)) {
 433                 /* center the row */
 434                 list_window_center(lw, current.lines->len, lw->selected);
 435                 screen_song_repaint();
 436                 return true;
 437         }
 438
 439         return false;
 440 }
 441
 442 const struct screen_functions screen_song = {
 443         .init = screen_song_init,
 444         .exit = screen_song_exit,
 445         .open = screen_song_update,
 446         .close = screen_song_clear,
 447         .resize = screen_song_resize,
 448         .paint = screen_song_paint,
 449         .update = screen_song_update,
 450         .cmd = screen_song_cmd,
 451         .get_title = screen_song_title,
 452 };
 453
 454 void
 455 screen_song_switch(struct mpdclient *c, const struct mpd_song *song)
 456 {
 457         assert(song != NULL);
 458         assert(current.selected_song == NULL);
 459         assert(current.played_song == NULL);
 460
 461         next_song = mpd_song_dup(song);
 462         screen_switch(&screen_song, c);
 463 }